rt

求帮忙看一下下面这份代码为什么过不了编译/kel

#include<bits/stdc++.h>
using namespace std;
long long a[205],b[205],Min=1e9;
int n,i;
void search(int x,int num,long long sum,long long sum2)
{
	if(x>n&&num){Min=min(Min,abs(sum-sum2));}
	if(x>n) return;
	search(x+1,num,sum,sum2);
	search(x+1,num+1,sum*a[x],sum2+b[x]);
}
int main()
{
	//freopen("food.in","r",stdin);
	//freopen("food.out","w",stdout);
	ios::sync_with_stdio(false);
	cin>>n;
	for(i=1;i<=n;i++) cin>>a[i]>>b[i];
	search(1,0,1,0);
	cout<<Min;
        return 0;
}

编译后显示 [Error] invalid type argument of unary '*' (have 'int')

然而这份代码就能编译通过

#include<bits/stdc++.h>
using namespace std;
long long a[205],b[205],Min=1e9;
int n,i;
void search(int x,long long sum,long long sum2)
{
	if(x>n&&(sum!=1||sum2!=0)){Min=min(Min,abs(sum-sum2));}
	if(x>n) return;
	search(x+1,sum,sum2);
	search(x+1,sum*a[x],sum2+b[x]);
}
int main()
{
	//freopen("food.in","r",stdin);
	//freopen("food.out","w",stdout);
	ios::sync_with_stdio(false);
	cin>>n;
	for(i=1;i<=n;i++) cin>>a[i]>>b[i];
	search(1,1,0);
	cout<<Min;
        return 0;
}

所以有大佬能帮个忙吗/kk

题目的话放2楼吧qwq